void Playback3D::copy_from_sync(Playback3DCommand *command)
{
#ifdef HAVE_GL
command->canvas->lock_canvas("Playback3D::draw_refresh_sync");
BC_WindowBase *window = command->canvas->get_canvas();
if(window)
{
window->lock_window("Playback3D:draw_refresh_sync");
window->enable_opengl();
int w = command->input->get_w();
int h = command->input->get_h();
if(command->input->get_opengl_state() == VFrame::SCREEN &&
w == command->frame->get_w() && h == command->frame->get_h())
{
// printf("Playback3D::copy_from_sync 1 %d %d %d %d %d\n",
// command->input->get_w(),
// command->input->get_h(),
// command->frame->get_w(),
// command->frame->get_h(),
// command->frame->get_color_model());
// With NVidia at least,
if(w % 4)
{
printf("Playback3D::copy_from_sync: w=%d not supported because it is not divisible by 4.\n", w);
}
else
// Copy to texture
if(command->want_texture)
{
//printf("Playback3D::copy_from_sync 1 dst=%p src=%p\n", command->frame, command->input);
// Screen_to_texture requires the source pbuffer enabled.
command->input->enable_opengl();
command->frame->screen_to_texture();
command->frame->set_opengl_state(VFrame::TEXTURE);
}
else
// Copy to RAM
{
command->input->enable_opengl();
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE,
command->frame->get_rows()[0]);
command->frame->flip_vert();
command->frame->set_opengl_state(VFrame::RAM);
}
}
else
{
printf("Playback3D::copy_from_sync: invalid formats opengl_state=%d %dx%d -> %dx%d\n",
command->input->get_opengl_state(), w, h,
command->frame->get_w(), command->frame->get_h());
}
window->unlock_window();
}
command->canvas->unlock_canvas();
#endif
}
void Playback3D::run_plugin_sync(Playback3DCommand *command)
{
command->canvas->lock_canvas("Playback3D::run_plugin_sync");
if(command->canvas->get_canvas())
{
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::run_plugin_sync");
window->enable_opengl();
command->result = ((PluginVClient*)command->plugin_client)->handle_opengl();
window->unlock_window();
}
command->canvas->unlock_canvas();
}
void Playback3D::write_buffer_sync(Playback3DCommand *command)
{
command->canvas->lock_canvas("Playback3D::write_buffer_sync");
if(command->canvas->get_canvas())
{
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::write_buffer_sync");
// Update hidden cursor
window->update_video_cursor();
// Make sure OpenGL is enabled first.
window->enable_opengl();
//printf("Playback3D::write_buffer_sync 1 %d\n", window->get_id());
switch(command->frame->get_opengl_state())
{
// Upload texture and composite to screen
case VFrame::RAM:
command->frame->to_texture();
draw_output(command);
break;
// Composite texture to screen and swap buffer
case VFrame::TEXTURE:
draw_output(command);
break;
case VFrame::SCREEN:
// swap buffers only
window->flip_opengl();
break;
default:
printf("Playback3D::write_buffer_sync unknown state\n");
break;
}
window->unlock_window();
}
command->canvas->unlock_canvas();
}
void Playback3D::overlay_sync(Playback3DCommand *command)
{
#ifdef HAVE_GL
command->canvas->lock_canvas("Playback3D::overlay_sync");
if(command->canvas->get_canvas())
{
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::overlay_sync");
// Make sure OpenGL is enabled first.
window->enable_opengl();
window->update_video_cursor();
// Render to PBuffer
if(command->frame)
{
command->frame->enable_opengl();
command->frame->set_opengl_state(VFrame::SCREEN);
canvas_w = command->frame->get_w();
canvas_h = command->frame->get_h();
}
else
// Render to canvas
{
canvas_w = window->get_w();
canvas_h = window->get_h();
}
glColor4f(1, 1, 1, 1);
//printf("Playback3D::overlay_sync 1 %d\n", command->input->get_opengl_state());
switch(command->input->get_opengl_state())
{
// Upload texture and composite to screen
case VFrame::RAM:
command->input->to_texture();
break;
// Just composite texture to screen
case VFrame::TEXTURE:
break;
// read from PBuffer to texture, then composite texture to screen
case VFrame::SCREEN:
command->input->enable_opengl();
command->input->screen_to_texture();
if(command->frame)
command->frame->enable_opengl();
else
window->enable_opengl();
break;
default:
printf("Playback3D::overlay_sync unknown state\n");
break;
}
const char *shader_stack[3] = { 0, 0, 0 };
int total_shaders = 0;
VFrame::init_screen(canvas_w, canvas_h);
// Enable texture
command->input->bind_texture(0);
// Convert colormodel to RGB if not nested.
// The color model setting in the output frame is ignored.
if(!command->is_nested)
{
switch(command->input->get_color_model())
{
case BC_YUV888:
case BC_YUVA8888:
shader_stack[total_shaders++] = yuv_to_rgb_frag;
break;
}
}
// Change blend operation
switch(command->mode)
{
case TRANSFER_NORMAL:
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
break;
case TRANSFER_REPLACE:
// This requires overlaying an alpha multiplied image on a black screen.
glDisable(GL_BLEND);
if(command->input->get_texture_components() == 4)
{
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = multiply_alpha_frag;
}
break;
// To do these operations, we need to copy the input buffer to a texture
// and blend 2 textures in another shader
case TRANSFER_ADDITION:
enable_overlay_texture(command);
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = blend_add_frag;
break;
case TRANSFER_SUBTRACT:
enable_overlay_texture(command);
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = blend_subtract_frag;
break;
case TRANSFER_MULTIPLY:
enable_overlay_texture(command);
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = blend_multiply_frag;
break;
case TRANSFER_MAX:
enable_overlay_texture(command);
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = blend_max_frag;
break;
case TRANSFER_MIN:
enable_overlay_texture(command);
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = blend_min_frag;
break;
case TRANSFER_DIVIDE:
enable_overlay_texture(command);
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag;
shader_stack[total_shaders++] = blend_divide_frag;
break;
}
unsigned int frag_shader = 0;
if(shader_stack[0])
{
frag_shader = VFrame::make_shader(0,
shader_stack[0],
shader_stack[1],
0);
glUseProgram(frag_shader);
// Set texture unit of the texture
glUniform1i(glGetUniformLocation(frag_shader, "tex"), 0);
// Set texture unit of the temp texture
glUniform1i(glGetUniformLocation(frag_shader, "tex2"), 1);
// Set dimensions of the temp texture
if(temp_texture)
glUniform2f(glGetUniformLocation(frag_shader, "tex2_dimensions"),
(float)temp_texture->get_texture_w(),
(float)temp_texture->get_texture_h());
}
else
glUseProgram(0);
// printf("Playback3D::overlay_sync %f %f %f %f %f %f %f %f\n",
// command->in_x1,
// command->in_y1,
// command->in_x2,
// command->in_y2,
// command->out_x1,
// command->out_y1,
// command->out_x2,
// command->out_y2);
command->input->draw_texture(command->in_x1,
command->in_y1,
command->in_x2,
command->in_y2,
command->out_x1,
command->out_y1,
command->out_x2,
command->out_y2,
// Don't flip vertical if nested
!command->is_nested);
glUseProgram(0);
// Delete temp texture
if(temp_texture)
{
delete temp_texture;
temp_texture = 0;
glActiveTexture(GL_TEXTURE1);
glDisable(GL_TEXTURE_2D);
}
glActiveTexture(GL_TEXTURE0);
glDisable(GL_TEXTURE_2D);
window->unlock_window();
}
command->canvas->unlock_canvas();
#endif
}
void Playback3D::do_fade_sync(Playback3DCommand *command)
{
#ifdef HAVE_GL
command->canvas->lock_canvas("Playback3D::do_mask_sync");
if(command->canvas->get_canvas())
{
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::do_fade_sync");
window->enable_opengl();
switch(command->frame->get_opengl_state())
{
case VFrame::RAM:
command->frame->to_texture();
break;
case VFrame::SCREEN:
// Read back from PBuffer
// Bind context to pbuffer
command->frame->enable_opengl();
command->frame->screen_to_texture();
break;
}
command->frame->enable_opengl();
command->frame->init_screen();
command->frame->bind_texture(0);
// glClearColor(0.0, 0.0, 0.0, 0.0);
// glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDisable(GL_BLEND);
unsigned int frag_shader = 0;
switch(command->frame->get_color_model())
{
// For the alpha colormodels, the native function seems to multiply the
// components by the alpha instead of just the alpha.
case BC_RGBA8888:
case BC_RGBA_FLOAT:
case BC_YUVA8888:
frag_shader = VFrame::make_shader(0,
fade_rgba_frag,
0);
break;
case BC_RGB888:
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ZERO);
glColor4f(command->alpha, command->alpha, command->alpha, 1);
break;
case BC_YUV888:
frag_shader = VFrame::make_shader(0,
fade_yuv_frag,
0);
break;
}
if(frag_shader)
{
glUseProgram(frag_shader);
int variable;
if((variable = glGetUniformLocation(frag_shader, "tex")) >= 0)
glUniform1i(variable, 0);
if((variable = glGetUniformLocation(frag_shader, "alpha")) >= 0)
glUniform1f(variable, command->alpha);
}
command->frame->draw_texture();
command->frame->set_opengl_state(VFrame::SCREEN);
if(frag_shader)
{
glUseProgram(0);
}
glColor4f(1, 1, 1, 1);
glDisable(GL_BLEND);
window->unlock_window();
}
command->canvas->unlock_canvas();
#endif
}
void Playback3D::convert_cmodel_sync(Playback3DCommand *command)
{
#ifdef HAVE_GL
command->canvas->lock_canvas("Playback3D::convert_cmodel_sync");
if(command->canvas->get_canvas())
{
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::convert_cmodel_sync");
window->enable_opengl();
// Import into hardware
command->frame->enable_opengl();
command->frame->init_screen();
command->frame->to_texture();
// Colormodel permutation
const char *shader = 0;
int src_cmodel = command->frame->get_color_model();
int dst_cmodel = command->dst_cmodel;
typedef struct
{
int src;
int dst;
const char *shader;
} cmodel_shader_table_t;
static cmodel_shader_table_t cmodel_shader_table[] =
{
{ BC_RGB888, BC_YUV888, rgb_to_yuv_frag },
{ BC_RGB888, BC_YUVA8888, rgb_to_yuv_frag },
{ BC_RGBA8888, BC_RGB888, rgba_to_rgb_frag },
{ BC_RGBA8888, BC_RGB_FLOAT, rgba_to_rgb_frag },
{ BC_RGBA8888, BC_YUV888, rgba_to_yuv_frag },
{ BC_RGBA8888, BC_YUVA8888, rgb_to_yuv_frag },
{ BC_RGB_FLOAT, BC_YUV888, rgb_to_yuv_frag },
{ BC_RGB_FLOAT, BC_YUVA8888, rgb_to_yuv_frag },
{ BC_RGBA_FLOAT, BC_RGB888, rgba_to_rgb_frag },
{ BC_RGBA_FLOAT, BC_RGB_FLOAT, rgba_to_rgb_frag },
{ BC_RGBA_FLOAT, BC_YUV888, rgba_to_yuv_frag },
{ BC_RGBA_FLOAT, BC_YUVA8888, rgb_to_yuv_frag },
{ BC_YUV888, BC_RGB888, yuv_to_rgb_frag },
{ BC_YUV888, BC_RGBA8888, yuv_to_rgb_frag },
{ BC_YUV888, BC_RGB_FLOAT, yuv_to_rgb_frag },
{ BC_YUV888, BC_RGBA_FLOAT, yuv_to_rgb_frag },
{ BC_YUVA8888, BC_RGB888, yuva_to_rgb_frag },
{ BC_YUVA8888, BC_RGBA8888, yuv_to_rgb_frag },
{ BC_YUVA8888, BC_RGB_FLOAT, yuva_to_rgb_frag },
{ BC_YUVA8888, BC_RGBA_FLOAT, yuv_to_rgb_frag },
{ BC_YUVA8888, BC_YUV888, yuva_to_yuv_frag },
};
for(int i = 0; i < sizeof(cmodel_shader_table) / sizeof(cmodel_shader_table_t); i++)
{
if(cmodel_shader_table[i].src == src_cmodel &&
cmodel_shader_table[i].dst == dst_cmodel)
{
shader = cmodel_shader_table[i].shader;
break;
}
}
// printf("Playback3D::convert_cmodel_sync %d %d %d shader=\n%s",
// __LINE__,
// command->frame->get_color_model(),
// command->dst_cmodel,
// shader);
if(shader)
{
//printf("Playback3D::convert_cmodel_sync %d\n", __LINE__);
command->frame->bind_texture(0);
unsigned int shader_id = -1;
if(shader)
{
shader_id = VFrame::make_shader(0,
shader,
0);
glUseProgram(shader_id);
glUniform1i(glGetUniformLocation(shader_id, "tex"), 0);
}
command->frame->draw_texture();
if(shader) glUseProgram(0);
command->frame->set_opengl_state(VFrame::SCREEN);
}
window->unlock_window();
}
command->canvas->unlock_canvas();
#endif // HAVE_GL
}
void Playback3D::do_mask_sync(Playback3DCommand *command)
{
#ifdef HAVE_GL
command->canvas->lock_canvas("Playback3D::do_mask_sync");
if(command->canvas->get_canvas())
{
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::do_mask_sync");
window->enable_opengl();
switch(command->frame->get_opengl_state())
{
case VFrame::RAM:
// Time to upload to the texture
command->frame->to_texture();
break;
case VFrame::SCREEN:
// Read back from PBuffer
// Bind context to pbuffer
command->frame->enable_opengl();
command->frame->screen_to_texture();
break;
}
// Create PBuffer and draw the mask on it
command->frame->enable_opengl();
// Initialize coordinate system
int w = command->frame->get_w();
int h = command->frame->get_h();
command->frame->init_screen();
int value = command->keyframe_set->get_value(command->start_position_project,
PLAY_FORWARD);
float feather = command->keyframe_set->get_feather(command->start_position_project,
PLAY_FORWARD);
// Clear screen
glDisable(GL_TEXTURE_2D);
if(command->default_auto->mode == MASK_MULTIPLY_ALPHA)
{
glClearColor(0.0, 0.0, 0.0, 0.0);
glColor4f((float)value / 100,
(float)value / 100,
(float)value / 100,
1.0);
}
else
{
glClearColor(1.0, 1.0, 1.0, 1.0);
glColor4f((float)1.0 - (float)value / 100,
(float)1.0 - (float)value / 100,
(float)1.0 - (float)value / 100,
1.0);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Draw mask with scaling to simulate feathering
GLUtesselator *tesselator = gluNewTess();
gluTessProperty(tesselator, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_ODD);
gluTessCallback(tesselator, GLU_TESS_VERTEX, (GLvoid (*) ( )) &glVertex3dv);
gluTessCallback(tesselator, GLU_TESS_BEGIN, (GLvoid (*) ( )) &glBegin);
gluTessCallback(tesselator, GLU_TESS_END, (GLvoid (*) ( )) &glEnd);
gluTessCallback(tesselator, GLU_TESS_COMBINE, (GLvoid (*) ( ))&combine_callback);
// Draw every submask as a new polygon
int total_submasks = command->keyframe_set->total_submasks(
command->start_position_project,
PLAY_FORWARD);
float scale = feather + 1;
int display_list = glGenLists(1);
glNewList(display_list, GL_COMPILE);
for(int k = 0; k < total_submasks; k++)
{
gluTessBeginPolygon(tesselator, NULL);
gluTessBeginContour(tesselator);
ArrayList<MaskPoint*> *points = new ArrayList<MaskPoint*>;
command->keyframe_set->get_points(points,
k,
command->start_position_project,
PLAY_FORWARD);
int first_point = 0;
// Need to tabulate every vertex in persistent memory because
// gluTessVertex doesn't copy them.
ArrayList<GLdouble*> coords;
for(int i = 0; i < points->total; i++)
{
MaskPoint *point1 = points->values[i];
MaskPoint *point2 = (i >= points->total - 1) ?
points->values[0] :
points->values[i + 1];
// This is very slow.
float x, y;
int segments = (int)(sqrt(SQR(point1->x - point2->x) + SQR(point1->y - point2->y)));
if(point1->control_x2 == 0 &&
point1->control_y2 == 0 &&
point2->control_x1 == 0 &&
point2->control_y1 == 0)
segments = 1;
float x0 = point1->x;
float y0 = point1->y;
float x1 = point1->x + point1->control_x2;
float y1 = point1->y + point1->control_y2;
float x2 = point2->x + point2->control_x1;
float y2 = point2->y + point2->control_y1;
float x3 = point2->x;
float y3 = point2->y;
for(int j = 0; j <= segments; j++)
{
float t = (float)j / segments;
float tpow2 = t * t;
float tpow3 = t * t * t;
float invt = 1 - t;
float invtpow2 = invt * invt;
float invtpow3 = invt * invt * invt;
x = ( invtpow3 * x0
+ 3 * t * invtpow2 * x1
+ 3 * tpow2 * invt * x2
+ tpow3 * x3);
y = ( invtpow3 * y0
+ 3 * t * invtpow2 * y1
+ 3 * tpow2 * invt * y2
+ tpow3 * y3);
if(j > 0 || first_point)
{
GLdouble *coord = new GLdouble[3];
coord[0] = x / scale;
coord[1] = -h + y / scale;
coord[2] = 0;
coords.append(coord);
first_point = 0;
}
}
}
// Now that we know the total vertices, send them to GLU
for(int i = 0; i < coords.total; i++)
gluTessVertex(tesselator, coords.values[i], coords.values[i]);
gluTessEndContour(tesselator);
gluTessEndPolygon(tesselator);
points->remove_all_objects();
delete points;
coords.remove_all_objects();
}
glEndList();
glCallList(display_list);
glDeleteLists(display_list, 1);
glColor4f(1, 1, 1, 1);
// Read mask into temporary texture.
// For feathering, just read the part of the screen after the downscaling.
float w_scaled = w / scale;
float h_scaled = h / scale;
// Don't vary the texture size according to scaling because that
// would waste memory.
// This enables and binds the temporary texture.
glActiveTexture(GL_TEXTURE1);
BC_Texture::new_texture(&temp_texture,
w,
h,
command->frame->get_color_model());
temp_texture->bind(1);
glReadBuffer(GL_BACK);
// Need to add extra size to fill in the bottom right
glCopyTexSubImage2D(GL_TEXTURE_2D,
0,
0,
0,
0,
0,
(int)MIN(w_scaled + 2, w),
(int)MIN(h_scaled + 2, h));
command->frame->bind_texture(0);
// For feathered masks, use a shader to multiply.
// For unfeathered masks, we could use a stencil buffer
// for further optimization but we also need a YUV algorithm.
unsigned int frag_shader = 0;
switch(temp_texture->get_texture_components())
{
case 3:
if(command->frame->get_color_model() == BC_YUV888)
frag_shader = VFrame::make_shader(0,
multiply_yuvmask3_frag,
0);
else
frag_shader = VFrame::make_shader(0,
multiply_mask3_frag,
0);
break;
case 4:
frag_shader = VFrame::make_shader(0,
multiply_mask4_frag,
0);
break;
}
if(frag_shader)
{
int variable;
glUseProgram(frag_shader);
if((variable = glGetUniformLocation(frag_shader, "tex")) >= 0)
glUniform1i(variable, 0);
if((variable = glGetUniformLocation(frag_shader, "tex1")) >= 0)
glUniform1i(variable, 1);
if((variable = glGetUniformLocation(frag_shader, "scale")) >= 0)
glUniform1f(variable, scale);
}
// Write texture to PBuffer with multiply and scaling for feather.
command->frame->draw_texture(0, 0, w, h, 0, 0, w, h);
command->frame->set_opengl_state(VFrame::SCREEN);
// Disable temp texture
glUseProgram(0);
glActiveTexture(GL_TEXTURE1);
glDisable(GL_TEXTURE_2D);
delete temp_texture;
temp_texture = 0;
glActiveTexture(GL_TEXTURE0);
glDisable(GL_TEXTURE_2D);
// Default drawable
window->enable_opengl();
window->unlock_window();
}
command->canvas->unlock_canvas();
#endif
}
void Playback3D::overlay_sync(Playback3DCommand *command)
{
#ifdef HAVE_GL
// To do these operations, we need to copy the input buffer to a texture
// and blend 2 textures in a shader
static const char * const overlay_shaders[TRANSFER_TYPES] = {
blend_normal_frag, // TRANSFER_NORMAL
blend_add_frag, // TRANSFER_ADDITION
blend_subtract_frag, // TRANSFER_SUBTRACT
blend_multiply_frag, // TRANSFER_MULTIPLY
blend_divide_frag, // TRANSFER_DIVIDE
blend_replace_frag, // TRANSFER_REPLACE
blend_max_frag, // TRANSFER_MAX
blend_min_frag, // TRANSFER_MIN
blend_average_frag, // TRANSFER_AVERAGE
blend_darken_frag, // TRANSFER_DARKEN
blend_lighten_frag, // TRANSFER_LIGHTEN
blend_dst_frag, // TRANSFER_DST
blend_dst_atop_frag, // TRANSFER_DST_ATOP
blend_dst_in_frag, // TRANSFER_DST_IN
blend_dst_out_frag, // TRANSFER_DST_OUT
blend_dst_over_frag, // TRANSFER_DST_OVER
blend_src_frag, // TRANSFER_SRC
blend_src_atop_frag, // TRANSFER_SRC_ATOP
blend_src_in_frag, // TRANSFER_SRC_IN
blend_src_out_frag, // TRANSFER_SRC_OUT
blend_src_over_frag, // TRANSFER_SRC_OVER
blend_or_frag, // TRANSFER_OR
blend_xor_frag // TRANSFER_XOR
};
command->canvas->lock_canvas("Playback3D::overlay_sync");
if(command->canvas->get_canvas()) {
BC_WindowBase *window = command->canvas->get_canvas();
window->lock_window("Playback3D::overlay_sync");
// Make sure OpenGL is enabled first.
window->enable_opengl();
window->update_video_cursor();
glColor4f(1, 1, 1, 1);
glDisable(GL_BLEND);
if(command->frame) {
// Render to PBuffer
command->frame->enable_opengl();
command->frame->set_opengl_state(VFrame::SCREEN);
canvas_w = command->frame->get_w();
canvas_h = command->frame->get_h();
}
else {
// Render to canvas
canvas_w = window->get_w();
canvas_h = window->get_h();
}
//printf("Playback3D::overlay_sync 1 %d\n", command->input->get_opengl_state());
switch(command->input->get_opengl_state()) {
// Upload texture and composite to screen
case VFrame::RAM:
command->input->to_texture();
break;
// Just composite texture to screen
case VFrame::TEXTURE:
break;
// read from PBuffer to texture, then composite texture to screen
case VFrame::SCREEN:
command->input->enable_opengl();
command->input->screen_to_texture();
if(command->frame)
command->frame->enable_opengl();
else
window->enable_opengl();
break;
default:
printf("Playback3D::overlay_sync unknown state\n");
break;
}
const char *shader_stack[4] = { 0, 0, 0, 0, };
int total_shaders = 0;
VFrame::init_screen(canvas_w, canvas_h);
// Enable texture
command->input->bind_texture(0);
// Convert colormodel to RGB if not nested.
// The color model setting in the output frame is ignored.
if( command->is_nested <= 0 ) { // not nested
switch(command->input->get_color_model()) {
case BC_YUV888:
case BC_YUVA8888:
shader_stack[total_shaders++] = yuv_to_rgb_frag;
break;
}
}
// get the shaders
#define add_shader(s) \
if(!total_shaders) shader_stack[total_shaders++] = read_texture_frag; \
shader_stack[total_shaders++] = s
switch(command->mode) {
case TRANSFER_REPLACE:
// This requires overlaying an alpha multiplied image on a black screen.
if( command->input->get_texture_components() != 4 ) break;
add_shader(overlay_shaders[command->mode]);
break;
default:
enable_overlay_texture(command);
add_shader(overlay_shaders[command->mode]);
break;
}
// if to flatten alpha
if( command->is_nested < 0 ) {
switch(command->input->get_color_model()) {
// yuv has already been converted to rgb
case BC_YUVA8888:
case BC_RGBA_FLOAT:
case BC_RGBA8888:
add_shader(rgba_to_rgb_flatten);
break;
}
}
// run the shaders
unsigned int frag_shader = 0;
if(shader_stack[0]) {
frag_shader = VFrame::make_shader(0,
shader_stack[0], shader_stack[1],
shader_stack[2], shader_stack[3], 0);
glUseProgram(frag_shader);
// Set texture unit of the texture
glUniform1i(glGetUniformLocation(frag_shader, "tex"), 0);
// Set texture unit of the temp texture
glUniform1i(glGetUniformLocation(frag_shader, "tex2"), 1);
// Set alpha
int variable = glGetUniformLocation(frag_shader, "alpha");
glUniform1f(variable, command->alpha);
// Set dimensions of the temp texture
if(temp_texture)
glUniform2f(glGetUniformLocation(frag_shader, "tex2_dimensions"),
(float)temp_texture->get_texture_w(),
(float)temp_texture->get_texture_h());
}
else
glUseProgram(0);
// printf("Playback3D::overlay_sync %f %f %f %f %f %f %f %f\n",
// command->in_x1, command->in_y1, command->in_x2, command->in_y2,
// command->out_x1, command->out_y1, command->out_x2, command->out_y2);
command->input->draw_texture(
command->in_x1, command->in_y1, command->in_x2, command->in_y2,
command->out_x1, command->out_y1, command->out_x2, command->out_y2,
// Don't flip vertical if nested
command->is_nested > 0 ? 0 : 1);
glUseProgram(0);
// Delete temp texture
if(temp_texture) {
delete temp_texture;
temp_texture = 0;
glActiveTexture(GL_TEXTURE1);
glDisable(GL_TEXTURE_2D);
}
glActiveTexture(GL_TEXTURE0);
glDisable(GL_TEXTURE_2D);
window->unlock_window();
}
command->canvas->unlock_canvas();
#endif
}